Rock crusher bowl support



Oct. 25, 1966 L. w. JOHNSON 3,281,083

ROCK CRUSHER BOWL SUPPORT Original Filed Nov. 12, 1963 2 Sheets-Sheet 1Fig. 2 5/ 76' 62 LOU/5 W JOHNSON INVENTOR.

B) 5 4/ BUG/(HORN, BLOl-PE, KLAROU/ST 8 SPAR/(MN ATTORNEYS 7 Oct. 25,1966 w. JOHNSON 3,281,083

ROCK GRUSHER BOWL SUPPORT Original Filed Nov. 12, 1963 2 Sheets-Sheet 2LOU/5 W JOHNSON lA/VEA/TOR. F 19. 5 5r BUG/(HORN, BLORE, KLAROU/ST aSPAR/(MM ATTORNEYS United States Patent 3,281,083 ROCK CRUSHER BOWLSUPPORT Louis W. Johnson, 3440 Franklin Blvd., Eugene, Oreg. Originalapplication Nov. 12, 1963, Ser. No. 322,673. Divided and thisapplication Sept. 7, 1965, Ser. No. 485,460

Claims. (Cl. 241208) This invention relates to improvements in rockcrushers and particularly to improvements in the bowl supportarrangernent therefor. This application is copending with, and adivision of, my prior application entitled Rock Crusher, Serial No.322,673, filed November 12, 1963.

It is common practice in rock crushers to provide a bowl of manganesesteel. A problem is presented how to support the bowl in spacedoverlying relationship to the rotary head of the crusher and inunderlying relation to the bonnet of the crusher.

It is a main object of the present invention to provide a novelarrangement for supporting the bowl from the bonnet of a rock crusher.

A more specific object of the invention is to provide a rock crusherhaving a bowl formed with upstanding integral ears which projectupwardly through openings in the overlying bonnet, the bowl beingretained in place by securing means operatively connecting the ears andbonnet.

Another object is to provide a novel bowl for a rock crusher.

Various other objects of the invention will be apparent from thefollowing description taken in connection with the accompanying drawingswherein:

FIG. 1 is a vertical, midsectional, fragmentary view througha rockcrusher of the present invention, FIG. 1 being taken along line 11 ofFIG. 4;

FIG. 2 is an enlarged View of a portion of the structure in FIG. 1;

FIG. 3 is a horizontal, fragmentary section taken along line 33 of FIG.1;

FIG. 4 is a horizontal section taken along line 44 of FIG. 1; and

FIG. 5 is a schematic diagram showing part of the hydraulic circuit ofthe bonnet support clamp system.

The crusher in FIGS. 1-5 has a main frame F which rotatably supports acamming member C which in turn rotatably supports a crusher head H. Thecamming member is driven by a drive system D to cause wobbling movementof the crusher head. This general arrangement is shown more fully in myUnited States Patent No. 3,118,623, which was copending with my priorparent application heretofore identified.

A bonnet support 11 is supported on the frame F by a plurality ofsupporting assemblies A of the present invention, one being shown inFIG. 1 and twelve being shown in FIG. 4. The bonnet support supports abonnet unit which includes a bonnet 13 and a bowl or concave 15.

Mounted on the bonnet support is a hold-down system HDS for holding thebonnet 13 down against the bonnet support 11, and releasable whennon-crushable matter enters the crusher to prevent damage to thecrusher. Because certain parts of the hold-down system appear in thedrawings in places where their identity would be helpful, a briefreference to such parts will now be made. The major part of thehold-down system is supported in spaced relation above the bonnetsupport by a plurality of spacer studs 21 (FIGS. 1 and 4), and thehold-down system includes a plurality of piston and cylinder units 22which apply downward pressure on the bonnet unit through thrust pins 23(FIGS. 1 and 4).

The bonnet support is retained in fixed relation to the main frame F,both vertically and laterally, by the supporting assemblies A. Since theassemblies are of identical construction, the detail construction of onewill sufiice.

Referring to FIGS. 1 and 2, an assembly includes a vertical rod in theform of a draw bolt 31 which has a head 33 (FIG. 1) disposed beneath acurved segment 35 of a segmented wedging ring. Two other segments 35aand 35b are shown in FIG. 3 in flanking relation to a fourth segment350, which is shown in FIG. 1 on the opposite side of the frame F fromsegment 35.

The wedging ring segments fit between a camming surface provided by aninwardly extending lip 37 on frame F and an opposed surface provided byan annular skirt 39 on the bonnet support 11. The shank of the draw bolt31 projects upwardly through matching but somewhat oversize holes in thesegment 35 and the inwardly extending lip 37. The draw bolt shank thenextends upwardly through slots 41 (FIG. 1) of a lower stack S of shims,through an outwardly projecting annular flange 43 on the bonnet support11, through an expander unit 45, and then through the slots 41 of anupper stack S of shims. A washer 47 (FIG. 2) fits on the upper end ofthe draw bolt, which end is threaded to receive a pair of jam nuts 49.

The expander unit is best shown in FIG. 2 and includes an open topcylinder 61 having a depending tubular portion 62 fitting in a recessformed in the flange 43. A piston 63 slidably fits within the cylinderand slidably engages the draw bolt 31 and has a depending tubularportion 65 slidably fitting within a head 67 of the cylinder. Spacedseals at 69 and 71 are provided between the piston and cylinder. Sincethere is no seal between the draw bolt and either the piston orcylinder, the draw bolts need not have a specially machined surface.

Fluid is supplied to the expander unit 45 through a nipple 73 whichcommunicates with an manifold groove 75 in the periphery of the flange43 of the bonnet support. A closure strip 76 closes the outer portion ofthe groove to provide a passageway. FIG. 5 shows that the groove isconnected by a conduit 77 to an accumulator 79 of the crusher. A valve81 controls the flow of fluid from the accumulator to the groove. Avalve 83 controls the discharge of fluid from the groove 75. Thedischarged fluid may be discarded or many be returned to the accumulatorthrough a pump 84. If the pump 84 is employed, it is contemplated thatthe valve 83 will be provided with a quick disconnect coupling 85 toenable it to be readily connected to a similar coupling 86 on adischarge or drain hose 87 to discharge the fluid into a fluid reservoir88. The fluid can be' returned to the pump 84 through a line 89. When itis desired to return fluid to the accumulator, a pressure hose 90 fromthe pump 84, having a quick disconnect coupling 91, is connected to thecoupling 85. The valve 83 is opened and pressure is built up in themanifold groove 75, after which the valve 81 is opened to inject fluidinto the accumulator 79. Then valve 83 is closed to isolate the pump 84from the overall hydraulic circuit of the crusher. The pump may beremoved from the machine or may be permanently mounted on the machine,and may be manually operated or power operated.

The accumulator 79 mentioned above is one of the accumulators already onthe machine for supplying fluid under pressure to piston and cylinderunits 22 of the holddo-wn system HDS.

There are a pair of stops in spaced relation beneath each of the wedgingsegments, and FIG. 1 shows one of the stops 92 beneath the segment 350.These stops merely limit downward movement of the segments after theyhave been released.

A screw jack 93 (FIGS. 1 and 3) is provided for each wedging segment forbreaking the segment away from its wedged position. The screw jacks arethe same and so a description of the one shown in FIG. 1 will suffice.

The jack 93 threads downwardly through a nut 95,

which is threadedly mounted in the flange 43, and then extendsdownwardly toward and is in alignment with a headed break pin 97. Thebreak pin 97 extends downwardly through an oversize hole in the framelip 37 and bottoms in a blind hole 99 formed in the segment 350. In suchposition, the head 101 of the pin 97 is slightly spaced from a seat 103formed in the flange 43.

When fluid is released from the expander units 45 of the supportingassemblies A of the bonnet support, the upward forces on the draw bolts31 are released. Then, by threading down the jack screws, the pins 97are forced downwardly to break the fractional grip between the wedgingsegments and the lip 43 and skirt 39. Thereafter the heads of the pins97 seat in their seats so that further pressure applied against thebreak pins (when lifting the bonnet support) will be transmitteddirectly to the main frame F.

A dirt shield 106 is provided on the piston 63 of each unit 45 andoverlaps the associated cylinder 61. The bowl or concave isconventionally formed of manganese steel. I support this bowl from thebonnet 13 by means of a plurality of ears 109 (FIGS. 1 and 4), six beingshown, which are cast on the bowl proper and project upwardly throughopenings or notches 113 formed in the bonnet. The openings 113 aredefined by bosses 115 which have horizontal upper edges. Wedges pieces117 are driven through the'openings 119 in the ears 109 and across suchedges to draw thebowl upwardly against the bonnet. Thereafter a filler121 can be poured into the space formed between the bowl and bonnet toform a good load bearing material between the upper portion of the bowland bonnet.

I provide a dust guard shield 123 (FIG. 1) around the crusher to enclosethe space between the flange 43 and the lip 37 to keep dirt fromaccumulating in the holes occupied by the break pins 97 Having describedthe invention in what is considered to be the preferred embodimentthereof, it is desired that it be understood that the invention is notto be limited other than by the provisions of the following claims.

I claim:

1. A rock crusher having a manganese steel bowl,

a bonnet for carrying the bowl,

said bonnet having a plurality of openings therein,

said bowl having a plurality of integral upstanding ears projectingupwardly through said openings, said ears having fully enclosed,transversely extending holes therethrough,

and wedging means extending through said holes and disposed in wedgingrelationship between said ears and the upper surface of said bonnet,

formed 2. In a rock crusher of the type having a rotary head andacircular bowl disposed in general overlying spaced relation with respectto said head, i

a circular bonnet above said bowl,

a frame supporting said bonnet,

said bonnet having a plurality of openings formed in spacedcircumferential relation thereabout,

said bowl having a plurality of integral upstanding ears projectingupwardly through said openings,

said ears having in the upper portions thereof holes extendingtransversely therethrough, said holes being centrally disposed in saidears to define pairs of legsjo n opposite sides of said holes,.and

wedging means extending through said holes and dis posed in wedgingrelationship between said ears and the upper surface of said bonnet.

3. A rock crusher as set forth in claim 2, wherein said bonnet includesbosses through which said openings extend and said bowl and bonnet aregenerally of frustoconical form and obliquely related to the horizontal,but where the axes of said ears and bosses are vertical.

4. A bowl or liner for a rock crusher of the type having a head forgyration beneath the bowl and cooperable therewith for crushing rock anda bonnet thereabove against which the bowl is to be clamped,

said bowl comprising a generally circular rigid member having a lowercrushing face that generally is of frusto-conical form, 7

said bowl having an upper mounting face for engagement with the bonnetof said crusher,

said bowl having a plurality of uniformly spaced upstanding ears forprojecting through said bonnet and by which said bowl may be clampedagainst said bonnet by wedges driven through said ears,

said ears defining fully enclosed loops for receiving said wedges toprovide balanced tension on both legs of each loop.

5. The liner of claim 4 wherein the upper surface of said bowl comprisesa lower frusto-con-ical portion adapted to fit in the bonnet and anupper portion stepped inwardly from said lower frusto-conical portionfor defining-a space with the adjacent portion of said bonnet forreceiving a filler.

References Cited by the Examiner UNITED STATES PATENTS 2,226,341 12/1940 Gruender 241-299 ROBERT C. RIORDON, Primary Examiner. LESTER M.SWINGLE, Examiner.

D. KELLY, Assistant Examiner.

2. IN A ROCK CRUSHER OF THE TYPE HAVING A ROTARY HEAD AND A CIRCULARBOWL DISPOSED IN GENERAL OVERLYING SPACED RELATION WITH RESPECT TO SAIDHEAD, A CIRCULAR BONNET ABOVE SAID BOWL, A FRAME SUPPORTING SAID BONNET,SAID BONNET HAVING A PLURALITY OF OIPENINGS FORMED IN SPACEDCIRCUMFERENTIAL RELATION THEREABOUT, SAID BOWL HAVING A PLURALITY OFINTEGRAL UPSTANDING EARS PROJECTING UPWARDLY THROUGH SAID OPENINGS, SAIDEARS HAVING IN THE UPPER PORTIONS THEREOF HOLES EXTENDING TRANSVERSELYTHERETHROUGH, SAID HOLES BEING CENTRALLY DISPOSED IN SAID EARS TO DEFINEPAIRS OF LEGS ON OPPOSITE SIDES OF SAID HOLES, AND WEDGING MEANSEXTENDING THROUGH SAID HOLES AND DISPOSED IN WEDGING RELATIONSHIPBETWEEN SAID EARS AND THE UPPER SURFACE OF SAID BONNET.